What multiplies to 5 but adds to negative 4?

The answer is - 5 and - 1

...

So find factors of 5

1 and 5

both factors must be both negative or both positive to be positive 5

adds to negative 4

to do that, they both must be negative

-5 times - 1=5

-5+-1=-6

doesn't work

the only way it would work is if it is what multipies to - 5 and adds to - 4 which then the numbers would be - 5 and 1